A water tanker filled up to \(\frac{2}{3}\) of its height is moving with a uniform speed, on sudden application of the brake, the water in the tank would

(a)

move backward

(b)

be unaffected

(c)

rise upwards

(d)

move forward

In a myopic eye, the image of the object is formed

(a)

behind the retina

(b)

on the retina

(c)

in front of the retina

(d)

on the blind spot

Thermal conduction in metal is due to

(a)

Free electrons

(b)

bound electrons

(c)

Vibration of molecules

(d)

vibration of atoms

Radio ________ is used to locate brain tumors.

(a)

iron

(b)

iodine

(c)

indium

(d)

cobalt

The volume occupied by 1 mole of a diatomic gas at S.T.P is

(a)

11.2 litre

(b)

5.6 litre

(c)

22.4 litre

(d)

44.8 litre

Blister copper contains _________

(a)

50% pure copper

(b)

99% pure copper and 1% impurities

(c)

98% pure copper and 2% impurities

(d)

75% pure copper and 25% impurities

When pressure is increased at constant temperature the solubility of gases in liquid _________

(a)

No change

(b)

increases

(c)

decreases

(d)

no reaction

The body of leech has

(a)

23 segments

(b)

33 segments

(c)

38 segments

(d)

30 segments

_____ carry command from spinal cord to our arm.

(a)

Motor neurons

(b)

Sensory neurons

(c)

Unipolar neurons

(d)

Afferent neurons

The term Ethnobotany was coined by

(a)

Khorana

(b)

J.W. Harsbberger

(c)

Ronald Ross

(d)

Hugo de Vries

Where you will create category of blocks?

(a)

Block palette

(b)

Block menu

(c)

Script area

(d)

sprite

Why a spanner with a long handle is preferred to tighten screws in heavy vehicles?

Write the difference between conductor and insulator.

What is the audible range of frequency?

What is Molar volume of a gas?

A hot saturated solution of copper sulphate forms crystals as it cools. Why?

Draw the ultrastructure of a chloroplast and label the parts.

Which organ acts as suction pump in leech?

'Our teeth and an elephant's tusks are homologous organs'. Justify this statement. What do the analogous organs indicate?

What is adult onset diabetes?

What is Scratch?

Explain the refraction of light through a glass prism.

Find the final temperature of a copper rod. Whose area of cross section changes from 10 m² to 11 m² due to heating. The copper rod is initially kept at 90 K. (Coefficient of superficial expansion is 0.0021 /K)

Distinguish between Nuclear fission and nuclear fusion.

What is called homologous series? Give any three of its characteristics?

Differentiate between systemic circulation and pulmonary circulation.

Write a note on mutation.

Define Ethnobotany and write its importance.

Differentiate between outbreeding and inbreeding.

What is diabetes? Explain the types.

Program for print the word “Hello” with sound

1. Can a nickel spatula be used to stir copper sulphate solution? Justify your answer.

2. Describe mutation breeding with an example.

1. Metal A belongs to period 3 and group 13. A in red hot condition reacts with steam to form B. A with strong alkali forms C. Find A, B and C with reactions. (or) Metal belongs to 3rd period and 13th group in the modern periodic table of elements. A reacts with steam in red hot condition to form compound B. A also reacts with strong alkali (NaOH) to form conpound C. Find A, B and C. Write appropriate balance chemical equations.

2. Will the cool drinks give more fizz at top of the hills or at the foot? Explain.

1. Describe rocket propulsion.

2. What would be expected to happen if
   a) Gibberellin is applied to rice seedlings.
   b) A rotten fruit gets mixed with unripe fruits.
   c) When cytokinin is not added to culture medium